Valve.



Pate'ntad Aug. 7, |900.

C G U L LA N D V A L V E.

(Application filed Aug. 24, 1899.)

(H0 Model.)

ggf/@l md n @a a Wma/m6@ Hom-ima 3 F FIC@ PATENT CHARLES GULLAND, OFPITTSBURG, PENNSYLVANIA.

VALVE.

SPECIFICATION forming part of Letters Patent No. 655,342, dated August'7, 1900.

Application filed August 24, 1899. Serial No. 728,383. (No model.)

To all whom it may concern:

Be it known that I, CHARLES GULLAND, aA citizen of the United States,residing at Pittsburg, Pennsylvania, have invented certain new anduseful Improvementsin Valves, of which the following is a specification.

My invention is an improvement in valves of the class in which a movablepiston controls the flow of water, the piston being kept to its seat bythe pressure and automatically operated by cutting off the pressuretothe rear or upper side, so as to allow the pressure to be exerted on theopposite side to open the same. Y

Mypresent invention is designed to provide means to lessen the shock ofclosing and to make the closing action gradual or to adjust this actionas may be found desirable.

To this end my invention 'consists in adding to the constructionheretofore patented to me-as, for instance, in reissued Letters PatentNo.7l,l22,of March 1'1L,l899fa plunger fitted to a cylinder, thecylinder having avent controlled by a spring-pressed plunger, theplunger being in turn provided with a vent for the gradual admission ofair to allow the return of the main piston to close off the flow ofwater.

In the accompanying drawings; Figure lis a sectional view of the form ofautomatic valve, while Fig. 2 is a detail viewin section.

In the drawings, A represents the valvecasing, B the inlet, and C theoutlet. A piston-valve D moves over and is guided by a stationarycylinder E, which is provided with openings for the discharge of thewater when the valve D is raised. A supplemental passage a passes fromthe pressure side to the space above the valve D and has the eifect tokeep the valve closed normally. Thisv opening c for the discharge of thewater in the chamber F. As soon as the pressure is interrupted throughthe passage a full pressure is exerted on the under side of the valve Dand has the eect of lifting this valve, forcing the water out of thechamber F. The valve D is provided with a rod or stem d, projecting fromits upper surface, and this carries-a disk e, which closely tits acylindrical extension G. Surmounting this extension is a tubularextension H, carrying a springpressed plunger f. As the valve D risesthe disk e compresses the air in the cylinder G and unseats thespring-pressed disk of the plunger f and the air escapes through lateralopenings g. When it is desired to have the valve closed, the pressure istaken od of the push-button o, with the result that the water underpressure Hows into the chamber F and tends to force the valve to itsseat; but this action is opposed by the partial vacuum formed in thechamber G. To allow the final seating of the va1ve,'I form a ventthrough the plungerl f, as shown at h, and the size of this vent isregulated by a screw i, so that more or less air may be admitted tohasten or retard the descent of the disk e and the valve D under thepressure of the water.

In combination with au automatically-operating valve, a piston connectedwith said valve, a cylinder receiving the piston, a spring-pressedplunger, closing exit-openings from said cylinder and an adjustableventopening carried by said plunger, substantially asdescribed.

In testimony whereof I affix my signature in presence of two witnesses.

CHARLES GULLAND.

